Shimano's BB-UN55 Square Spindle Bottom Brackets are the unofficial standard for English-threaded cartridge bottom brackets. Quality, value, and durability come together to keep you cranking for many, many miles.
- Fits JIS Square-Taper Cranksets
- Hollow spindle
- Crankarm fixing bolts not included
|107mm / English / Square Taper / 68mm||689228778801||EBBUN55B07||BBS23134852M|
|110mm / English / Square Taper / 68mm||689228778887||EBBUN55B10||BBS23940807M|
|115mm / Italian / Square Taper / 70mm||689228778818||EBBUN55I15||SHI50884616T|